02 Ingeniería de Detalle y Conforme a Obra - Proyecto de Ingeniería

Stages of an Engineering Project

Overview of Detail Engineering

• Detail engineering is a comprehensive documentation process derived from basic engineering, encompassing all construction details across various disciplines such as civil, mechanical, electrical, telecommunications, instrumentation and control, and information systems.

Importance of Basic Engineering Review

• Before commencing detail engineering, it is crucial to conduct a thorough review of the basic engineering to identify necessary observations and propose improvements. This ensures that the detail engineering aligns with accepted values and technical specifications.

Compliance with Standards

• The execution of detail engineering must adhere to accepted norms, rules of art, and safety criteria. This compliance should be discussed at the beginning of the project to ensure clarity among all parties involved.

Documentation in Detail Engineering

• Key documents produced during detail engineering include plans, calculation memos, technical specifications, and material lists. These documents are collectively referred to as "plans," which serve as the final product for construction.

Clarity and Sufficiency of Plans

• Plans must be clear and self-sufficient; they should not require reference to other documents for understanding except in minor assembly details. Typical assembly detail plans may be created when necessary.

Plan Execution Process

Standardization in Plan Sizes

• It is recommended that all plans maintain a uniform size for easier filing and handling on-site. Common sizes include IRAM standard A1 (600 x 800 mm) or A4 (210 x 297 mm).

Initial Sketches for Clarity

• Creating hand-drawn sketches before executing formal plans can help clarify essential considerations and visualize what needs to be depicted in the final plan.

Approval Process for Construction Plans

• After completing revisions based on feedback from stakeholders, a plan can be issued as "approved for construction." This approval may involve multiple revisions until consensus is reached.

Revision Management

Identifying Revisions Clearly

• Each revision must be clearly defined; typically marked with clouds indicating changes compared to previous versions. Once approved by stakeholders, subsequent revisions are numbered sequentially (e.g., 1st revision).

Handling Modifications Post Approval

• Any modifications after initial approval need careful evaluation regarding their impact on timelines. New revisions should reflect these changes while maintaining clarity about previous versions through cloud markings.

Finalizing Construction Documents

Clean Versions of Plans

• A clean version of plans without any cloud markings signifies that they have been finalized post-revision zero ("approved for execution").

Importance of As-Built Drawings

• "As-built" drawings document how construction was executed compared to original designs. They are critical for future operations and maintenance activities.

Calculation Memos & Technical Specifications

Purpose of Calculation Memos

• Calculation memos document the rationale behind design decisions made during the project development phase. They often require client approval but are not issued directly to contractors or work sites.

Structure of Technical Specifications

• Technical specifications should clearly outline how tasks specified will be performed by contractors or how equipment provision will occur. They define functions rather than merely listing requirements.

Manual Constructivo del Equipo: Responsabilidades y Normas

Responsabilidad del Producto

• La responsabilidad de la calidad del producto recae en el contratista o proveedor, no en el ingeniero de proyecto.

• Para lograr la calidad deseada, es fundamental basarse en normas específicas que definan claramente los estándares requeridos durante el proceso de construcción.

Requerimientos Normativos

• Es crucial verificar los diferentes requerimientos de las normas durante la fabricación; mezclar normas puede generar problemas insuperables.

• Las especificaciones técnicas deben desarrollarse con claridad, abarcando objetivos, alcances y características tanto generales como particulares.

Documentación y Planillas

• Los proveedores deben anticipar y documentar las características detalladas de su provisión al momento del contrato para evitar malentendidos.

• Las planillas de materiales deben contener especificaciones precisas sobre los materiales requeridos, incluyendo características especiales cuando sea necesario.

Cálculo y Estimación en Ingeniería

Cómputo de Materiales

• Las cantidades de material deben derivarse de los planos y documentarse adecuadamente; esto incluye considerar pérdidas como recortes o robos.

• Los contratistas deben computar materiales menores que no se consideran a nivel ingenieril pero son necesarios para la obra, asegurando su adquisición adecuada.

Estimación de Horas-Hombre

• La estimación inicial debe incluir horas-hombre necesarias para completar el proyecto, considerando tareas no reflejadas en documentos formales.

• Se debe desarrollar un cronograma que analice el orden correcto para realizar las distintas tareas dentro del proyecto, evitando repeticiones innecesarias.

Revisión Continua y Modificaciones

Ingeniería Conforma Obra

• La ingeniería conforma obra implica registrar modificaciones realizadas durante la ejecución del proyecto, superando la ingeniería de detalle original.